Q1: In geodetic surveys higher accuracy is achieved, if

ANS:B - curvature of the earth surface is taken into account

In geodetic surveys, higher accuracy is achieved when the curvature of the Earth's surface is taken into account. The Earth is not flat but rather an oblate spheroid, meaning it is slightly flattened at the poles and bulges at the equator. Therefore, when conducting surveys over large distances or in areas with significant elevation changes, it's crucial to consider the curvature of the Earth. Ignoring the curvature can lead to inaccuracies in measurements, especially over long distances. In geodetic surveys, various mathematical models and techniques are used to account for the curvature of the Earth's surface. These include using ellipsoidal models of the Earth, employing geodetic datums, and applying correction factors to measurements to ensure accuracy. Therefore, considering the curvature of the Earth's surface is essential for achieving higher accuracy in geodetic surveys.